U.S. patent application number 12/557459 was filed with the patent office on 2010-11-18 for light source module and projector having same.
This patent application is currently assigned to HON HAI PRECISION INDUSTRY CO., LTD.. Invention is credited to CHIEN-FU CHEN.
Application Number | 20100290011 12/557459 |
Document ID | / |
Family ID | 43068244 |
Filed Date | 2010-11-18 |
United States Patent
Application |
20100290011 |
Kind Code |
A1 |
CHEN; CHIEN-FU |
November 18, 2010 |
LIGHT SOURCE MODULE AND PROJECTOR HAVING SAME
Abstract
A light source module includes a first light source, a second
light source, a third light source, and a first heat sink. The
first heat sink includes a first base and a number of first fins. A
bottom surface of the first base is attached to the first light
source and the second light source. The first fins perpendicularly
extend from a top surface of the first base away from the first
light source and the second light source. Each first fin includes a
first fin portion adjacent to the first light source and a second
fin portion adjacent to the second light source, and defines a
first slot for increasing the thermal resistance between the first
fin portion and the second fin portion.
Inventors: |
CHEN; CHIEN-FU; (Tu-Cheng,
TW) |
Correspondence
Address: |
Altis Law Group, Inc.;ATTN: Steven Reiss
288 SOUTH MAYO AVENUE
CITY OF INDUSTRY
CA
91789
US
|
Assignee: |
HON HAI PRECISION INDUSTRY CO.,
LTD.
Tu-Cheng
TW
|
Family ID: |
43068244 |
Appl. No.: |
12/557459 |
Filed: |
September 10, 2009 |
Current U.S.
Class: |
353/61 ; 362/231;
362/249.01 |
Current CPC
Class: |
G03B 21/16 20130101 |
Class at
Publication: |
353/61 ;
362/249.01; 362/231 |
International
Class: |
G03B 21/16 20060101
G03B021/16; F21S 4/00 20060101 F21S004/00; F21V 9/00 20060101
F21V009/00 |
Foreign Application Data
Date |
Code |
Application Number |
May 13, 2009 |
CN |
200910302260.3 |
Claims
1. A light source module comprising: a first light source; a second
light source; a third light source; and a first heat sink
comprising: a first base with a bottom surface attached to the
first light source and the second light source; and a plurality of
first fins perpendicularly extend from a top surface of the first
base away from the first light source and the second light source,
wherein each first fin comprises a first fin portion adjacent to
the first light source and a second fin portion adjacent to the
second light source, and defines a first slot for increasing the
thermal resistance between the first fin portion and the second fin
portion.
2. The light source module of claim 1, wherein the first light
source is a red light source, the second light source is a blue
light source, and the third light source is a green light
source.
3. The light source module of claim 1, wherein the first base
comprises a first base portion adjacent to the first light source
and a second base portion adjacent to the second light source, and
a base slot is defined on the first base located between the first
base portion and the second base portion.
4. The light source module of claim 3, wherein the base slot runs
through the first base.
5. The light source module of claim 1, further comprising a second
heat sink attached to the third light source for dissipating heat
generated from the third light source.
6. The light source module of claim 5, wherein the light source
module further comprises a heat pipe and a heat transmitting plate,
the heat transmitting plate is thermally coupled to the first fins,
the heat pipe is thermally coupled between the second heat sink and
the heat transmitting plate.
7. The light source module of claim 6, wherein each first fin
further defines a second slot between the heat transmitting plate
and the first base portion with the heat transmitting plate and the
first base portion located at two opposite sides of the second
slot.
8. The light source module of claim 6, wherein first fin portion is
located at one side of the first slot, and the second fin portion
and the heat transmitting plate are located at the other side of
the first slot.
9. A projector comprising: a casing defining an air inlet and an
air outlet; a blower for blowing air coming into the casing from
the air inlet towards the air outlet; and a light source module
comprising: a first light source; a second light source; a third
light source; and a first heat sink arranged between the blower and
the air outlet, the first heat sink comprising: a first base with a
bottom surface attached to the first light source and the second
light source; and a plurality of first fins perpendicularly extend
from a top surface of the first base away from the first light
source and the second light source, wherein each first fin
comprises a first fin portion adjacent to the first light source
and a second fin portion adjacent to the second light source, and
defines a first slot for increasing the thermal resistance between
the first fin portion and the second fin portion.
10. The projector of claim 9, wherein the first light source and
the second light source are arranged along a direction from the
blower to the air outlet in sequence.
11. The projector of claim 9, wherein the first fins are arranged
substantially parallel to the air flowing direction between the
blower and the air outlet.
12. The projector of claim 9, wherein the projector further
comprises an exhaust fan arranged at the air outlet.
13. The projector of claim 9, wherein the casing comprises a first
sidewall, a front wall, a second sidewall, and a rear wall
connected in sequence, the air outlet is defined on the front wall,
and the air inlet is defined on the first sidewall and adjacent to
the rear wall relative to the front wall.
14. The projector of claim 9, wherein the first light source is a
red light source, the second light source is a blue light source,
and the third light source is a green light source.
15. The projector of claim 9, wherein the first base comprises a
first base portion adjacent to the first light source and a second
base portion adjacent to the second light source, and a base slot
is defined on the first base located between the first base portion
and the second base portion.
16. The projector of claim 15, wherein the base slot runs through
the first base.
17. The projector of claim 9, wherein the light source module
further comprises a second heat sink attached to the third light
source for dissipating heat generated from the third light
source.
18. The projector of claim 17, wherein the light source module
further comprises a heat pipe and a heat transmitting plate, the
heat transmitting plate is thermally coupled to the first fins, the
heat pipe is thermally coupled between the second heat sink and the
heat transmitting plate.
19. The projector of claim 18, wherein each first fin further
defines a second slot between the heat transmitting plate and the
first base portion with the heat transmitting plate and the first
base portion located at two opposite sides of the second slot.
20. The projector of claim 18, wherein the first fin portion is
located at one side of the first slot, and the second fin portion
and the heat transmitting plate are located at the other side of
the first slot.
Description
BACKGROUND
[0001] 1. Technical Field
[0002] The present disclosure relates to projectors and,
particularly, to a light source module and a projector having the
same with effective heat dissipation.
[0003] 2. Description of Related Art
[0004] Due to reduction of the size of projectors, the density of
generated heat in projectors increases accordingly. As a result,
performance and reliability of the projectors will be influenced if
heat dissipation is not effectively provided, and the service life
span of the projectors may even be shortened. It is known that the
light source module is the main heat source in a projector, hence,
how to discharge the heat generated from the light source module
effectively is a challenge to designers in the related fields.
[0005] What is needed, therefore, is a light source module and a
projector having the same with effective heat dissipation to
overcome or at least mitigate the above-described problem.
BRIEF DESCRIPTION OF THE DRAWINGS
[0006] Many aspects of the present light source module and
projector can be better understood with reference to the
accompanying drawings. The components in the drawings are not
necessarily drawn to scale, the emphasis instead being placed upon
clearly illustrating the principle of the present light source
module and projector. In the drawings, all the views are
schematic.
[0007] FIG. 1 is a top plan view of a projector according to a
first exemplary embodiment.
[0008] FIG. 2 is an isometric view of a light source module of the
projector of FIG. 1.
[0009] FIG. 3 is a top plan view of a projector according to a
second exemplary embodiment.
DETAILED DESCRIPTION
[0010] Embodiments of the present disclosure will now be described
in detail below, with reference to the accompanying drawings.
[0011] Referring to FIGS. 1 and 2, a projector 100 according to an
exemplary embodiment, is shown. The projector 100 includes a casing
10, a blower 20, an exhaust fan 30, and a light source module
40.
[0012] The casing 10 is configured for housing the blower 20, the
exhaust fan 30, and the light source module 40. The casing 10
includes a front wall 11, a rear wall 12, a first sidewall 13, and
a second sidewall 14 opposite to the first sidewall 13. The first
sidewall 13, the front wall 11, the second sidewall 14, and the
rear wall 12 are connected in sequence. In the present embodiment,
the front wall 11 defines an air outlet 111, and the first sidewall
defines an air inlet 131 adjacent to the rear wall. The exhaust fan
30 and the blower 20 are arranged corresponding to the air outlet
111 and the air inlet 131, respectively. The blower 20 is
configured for blowing air coming into the casing 10 from the air
inlet 131 towards the air outlet 111.
[0013] The light source module 40 includes a red light source 41, a
blue light source 42, a green light source 43, a first heat sink
44, and a second heat sink 45.
[0014] In the present embodiment, the red light source 41, the blue
light source 42, and the green light source 43 are light emitting
diodes (LEDs). The red light source 41, the blue light source 42,
the green light source 43 are arranged to form a L-shaped
structure. The light emitting direction of the green light source
43 is perpendicular to the light emitting direction of the red
light source 41 and the blue light source 42. The red light source
41 and the blue light source 42 are arranged along a direction from
the blower 20 to the exhaust fan 30 in sequence.
[0015] The first heat sink 44 is attached to the red light source
41 and the blue light source 42 for dissipating heat generated from
the red light source 41 and the blue light source 42. The first
heat sink 44 includes a first base 441 and a number of first fins
442. A bottom surface of the first base 441 is attached to the red
light source 41 and the blue light source 42, and the first fins
442 perpendicularly extend from a top surface of the first base 441
away from the red light source 41 and the blue light source 42. The
first heat sink 44 is arranged between the blower 20 and the
exhaust fan 30.
[0016] The first base 441 includes a first base portion 441a
adjacent to the red light source 41 and a second base portion 441b
adjacent to the blue light source 42. A base slot 441c is defined
on the first base 441 located between the first base portion 441a
and the second base portion 441b. Therefore, the thermal resistance
between the first base portion 441a and the second base portion
441b can be increased. The base slot 441c can be designed running
through the first base 441.
[0017] The first fins 442 are arranged substantially parallel to
the air flowing direction between the blower 20 and the exhaust fan
30. Each first fin 442 includes a first fin portion 442a adjacent
to the red light source 41 and a second fin portion 442b adjacent
to the blue light source 42. A first slot 442c is defined on each
of the first fins 442 located between the first fin portion 442a
and the second fin portion 442b with the red light source 41 and
the blue light source 42 located at two opposite sides thereof
respectively. Therefore, the thermal resistance between the first
fin portion 442a and the second fin portion 442b can be increased.
Accordingly, the heat generated from the blue light source 42 would
not influence the heat dissipating of the red light source 41.
[0018] The second heat sink 45 is attached to the green light
source 43 for dissipating heat generated from the green light
source 43. The second heat sink 45 includes a second base 451 and a
number of second fins 452. The second fins 452 perpendicularly
extend from a surface of the second base 451 away from the green
light source 43. In the present embodiment, the second base 451 is
substantially perpendicular to the first base 441, and is connected
to the first base 441. In other embodiments, the red light source
41, the blue light source 42, and the green light source 43 can
also be arranged on a line, and the second base 451 can be
substantially coplanar with the first base 441.
[0019] In the present embodiment, the light source module 40
further includes a heat pipe 46 and a heat transmitting plate 47.
The heat transmitting plate 47 is fixed to the top end of the first
fins 442 away from the first base 441. The heat transmitting plate
47 is substantially perpendicular to the first fins 442, and is
thermally coupled to the first fins 442. The heat pipe 46 is
thermally coupled between the second base 451 of the second heat
sink 45 and the heat transmitting plate 47. The heat pipe 46 and
the heat transmitting plate 47 cooperatively transmit the heat from
the second base 451 to the first fins 442. In the present
embodiment, the first fin 442 further defines a second slot 442d
between the heat transmitting plate 47 and the first base portion
441a. The heat transmitting plate 47 and the first base portion
441a are located at two opposite sides of the second slot 442d,
therefore, the thermal resistance between the heat transmitting
plate 47 and the first base portion 441a can be increased.
Accordingly, the heat generated from the green light source 43
would not influence the heat dissipating of the red light source
41.
[0020] It is known that, the tolerable temperature of the red light
source 41 is lower than that of the blue light source 42 and the
green light source 43. In the present embodiment, the first slot
442c can increase the thermal resistance between the first fin
portion 442a and the second fin portion 442b, therefore, the heat
generated from the blue light source 42 would not influence the
heat dissipating of the red light source 41, accordingly, the red
light source 41 can have efficient heat dissipating. Furthermore,
because the red light source 41 and the blue light source 42 uses
one heat sink for heat dissipating, that would benefit to assembly
the light source module 40.
[0021] Referring to FIG. 3, a projector 200 according to a second
exemplary embodiment is shown. The projector 200 is similar to the
projector 100 of the first exemplary embodiment. The difference
between the projector 200 and the projector 100 is that, in the
projector 200 of the second exemplary embodiment, each first fin
210 defines a slot 213. The first fin portion 211 located at one
side of the slot 213, and the second fin portion 212 and the heat
transmitting plate 230 located at the other side of the slot
213.
[0022] While certain embodiments have been described and
exemplified above, various other embodiments will be apparent to
those skilled in the art from the foregoing disclosure. The
invention is not limited to the particular embodiments described
and exemplified, and the embodiments are capable of considerable
variation and modification without departure from the scope and
spirit of the appended claims.
* * * * *